This is certainly under active discussion.
For example, in respect to transportation, there are industries now where drug testing is already the norm. There are other countries that have that experience. Other ministers, other departments, and other processes are certainly looking within federal jurisdiction and provincial jurisdiction at ways in which employers who have a legitimate safety concern can decide whether they want to undertake testing, and what would be the legal framework around that.
That would be a combination of presumably federal regulation in respect to, for example, airline pilots or railway engineers, and provincial regulation in respect to certain construction or transportation trades, as you have talked about.